Wetproof blasting cap sealer



Aprc 79 3936., J, F. VANDERPOOL Er AL 2,036,5M

WETPROOF' BLASTING CAP SEALER Filed sept. 5, 1934 INVENTOR S ATTORN EY Patented Apr. 7, 1936 UNTED STATES PATENT OFFICE John F. Vanderpool and William H. Baker, Golden, Idaho Application September 5, 1934, Serial No. 742,836

1 Claim.

This invention relates to a blasting cap sealer and has for the primary object the provision of a means for protecting and sealing a blasting cap to prevent water, moisture or the like from affecting and destroying the cap and provide a safety medium to the cap and which will materially aid in applying the cap to an explosive material.

With these and other objects in view this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of our invention, reference is to be had to the following description and accompanying drawing, in which Figure l is a side elevation, partly in section, illustrating a blasting cap and sealer therefor.

Figure 2 is a vertical sectional View illustrating the blasting cap assembled in the sealer.

Figure 3 is a similar view illustrating a modified form of sealer.

Figure 4 is a similar view illustrating the blasting cap adapted to form a sealer shown in Figure 3.

Figure 5 is a vertical sectional View illustrating another modified form of sealer. i

Figure 6 is a side elevation, partly in section, illustrating the form of sealer shown in Figure 5 and adapted to a blasting cap.

Referring in detail to the drawing, the numeral I indicates a conventional type of blasting cap except the latter has a pointed end 2. The blasting cap receives a fuse 3 and is secured to the latter by being crimped, as shown at 4.

It is well known that blasting caps of this character readily absorb moisture or when contacted by water become defective failing to explode when ignited, consequently in turn failing to set off an explosive charge which in many instances has proven disastrous to persons working in mines and like places by accidentally setting oi explosive charges which have failed to explode at the proper time. To overcome these dangerous conditions and to assure setting 01T of the explosive charge, a sealer has been provided which consists of a tubular element 5 having one end closed by a pointed or tapered portion 6 while its opposite end is open to receive the blasting cap. The tubular member 5 is constructed of any suitable water-proof material which is readily destructible by the explosion of the blasting cap. A cushion liner 'I is located in the tubular member between the latter and the blasting cap and provides a safety medium to the blasting cap by acting as a cushion or shock absorber. The blasting cap when positioned in the tubular member 5, the latter extends a distance over the fuse 3 and is crimped to the latter, as shown at 8, thereby sealing the open end of the tubular member to the fuse, preventing water, moisture or the like from entering the tubular member and alTecting the blasting cap.

Referring to our modified form of invention, as shown in Figures 3 and 4, the sealer consists of a tubular member 9 constructed similar to the tubular member 5 except that the open end is tapered to form a restricted throat IU normally closed by a destructible cap II. Placed in the tubular member 9 is a moisture and water resisting material I3 adapted to protect a blasting cap when inserted therein, as shown in Figure 4. The restricted throat I9 is crimped to the fuse, as shown at I4, thereby eifectively sealing the tubular member 9 to the fuse. The cap II is readily destroyed when engaged by the pointed end of the blasting cap and is normally employed to retain the material I3 in the tubular member 9 prior to the introduction of the blasting cap.

Referring to our modified form of invention shown in Figures 5 and 6, the sealer consists of a tubular member I5 constructed similar to the tubular member 9 except the open end is flared to form an enlarged mouth I 6 and a shoulder or seat I'I arranged in the tubular member I5 inwardly of the mouth I6. A cushion sleeve I8 ts in the ared portion and rests against the seat I'I. The flared portion of the tubular member I5 is crimped to engage the cap, as shown at I9, thereby effectively closing the tubular member I5 with the blasting cap conned therein. The sealer having the pointed end facilitates the applying of the device to a stick of explosive material.

Having described the invention, we claim:

A blasting cap sealer comprising a hollow waterproof member having one end tapered and closed and its opposite end reduced to form a restricted throat, a waterproof material in said member, and a destructible cap closing the throat to retain the material in said member and destroyed by the insertion of a blasting cap and its fuse into said member by way of the throat.

JOHN F. VANDERPOOL. WILLIAM H. BAKER. 

